Product Description

Looking for a plug and play alternative for your stock or built late model factory EFI engine? How about a replacement ECU for your older Holley C950? Holley has you covered. HP EFI ECU and harness kits are designed to be used with popular factory EFI engines as an alternative to the factory ECU and harness or as a replacement for your C950 ECU. The HP allows you to accurately control the fuel and ignition of your engine along with additional controls for nitrous, boost or water meth.

ECU is fully potted and can be mounted in the engine compartment or interior

Sealed automotive and marine grade connectors

Allows for use of common OEM sensors as well as customer sensor calibration input

Ignition Plug and Play with GM 24x and 58x LSx engines, GM HEI, Ford TFI, magnetic and hall effect trigger, and other ignition systems. New Plug and Play applications in process. Custom settings can be configured to allow many other applications

1-5 Bar MAP sensor capability

Two channel knock control sensor Inputs for both one or two wire knock sensors

Dedicated fuel and oil pressure inputs

Controls both stepper and PWM Idle Air Control (IAC) motors

Speed density, Alpha-N, or combination fueling strategies

4 Programmable high or low Pulse Width Modulated (PWM) outputs and 4 fully configurable inputs can be configured for use

4 Stage nitrous oxide control

Fully featured nitrous control eliminates the need for a separate nitrous controller device

Can be configured “Wet” or “Dry” with closed loop feedback

Progressive control based on time, RPM, or boost, requires part # 554-111

Lean or rich safety cutoff

Full timing retard/control configurability per stage based on RPM or time

Integrated Water/Methanol injection control

Uses Holley Water/Meth solenoids specially designed and calibrated for use with this EFI system to allow the user to enter Water/Meth flow as a percentage of fuel injector flow for Water/Meth tubing